Seamless API 5L Grade B SSC Tested Line Pipe for dependable transmission of oil and gas to any type of collection and distribution point

This API 5L specification Covers Seamless and Welded Steel Line Pipe. It includes standard-weight and Extra-Strong threaded Line Pipe. It includes standard-weight and extra-strong threaded line pipe; and standard-weight plain-end, regular-weight plain-end, special plain-end, extra-strong plain-end, special plain-end, extra-strong plain-end pipe; as as well as bell and spigot and through-the-flow line(TFL) pipe.

The purpose of this specification is to provide standards for pipe suitable for use in conveying gas, water, and oil in both the oil and natural gas industries

Grades covered by this specification are A25 ,A ,B (and the following "X" Grades), X42, X46, X52, X56, X60, X65, X70, X80. The two digit number following the "X" indicates the Minimum Yield Strength (in 000's psi) of pipe produced to this grade.

API 5L Line Pipe can be either seamless or welded. Applications for API 5L include, but are not limited to: petroleum, petrochemical, natural gas industries, and waterworks.

API 5L Line Pipe is dimensionally equivalent to A106 and A53 pipe, conforming to industry standard sizes , however it performs to different mechanical properties. One key defining characteristic of this pipe is its yield strength, where the two digit number following the pipe’s "X" grade indicates the Minimum Yield Strength (in 000's psi) of pipe produced to this grade (i.e. X52 Pipe).

Savoy Piping Inc., is a Pipe Distributor in Middle East, Far East and Africa Region that provides API 5L line pipe from 1/2" to 64" in diameter, in grades X42, X46, X52, X60, X65, & X70.

SSC test to evaluate the resistance of pipeline and pressure vessel plate steels to Sour Service Corrosion caused by hydrogen absorption from aqueous sulfide corrosion. An unstressed test specimen is exposed to a solution at ambient temperature and pressure and after a specified time, the test specimen is removed and evaluated.

Specimen Size
To conduct the SSC test, requires the following sample sizes:

Pipe - upto 2" OD - 200mm long
If the pipe is more than 2" OD pipe - 100mm long sample size is required

Number of pieces to be tested upto 88mm thick/dia - set of 3 pieces to be tested
Number of pieces to be tested more than 88mm thick/dia - 5 pieces to be tested

NACE TM0284 Test Solution
NACE TM0284 specifies either Solution A or Solution B. Solution A is acidified brine. Solution B is simulated seawater prepared in accordance with ASTM D1141.52. In either case, H2S is bubbled through the solution constantly throughout the test period. NACE TM0284 specifies test duration of 96 hours.

Detailed Report
A detailed written report upon completion of each test. Each report includes a description of the test sample that was received, the test procedure that was used, and the pH values of the test solution before exposure and after the exposure. The test bars are cut into sections and examined under a microscope for hydrogen-induced cracks. The dimensions of any such cracks are recorded and used to compute the values in percentage for Crack Length Ratio (CLR), Crack Thickness Ratio (CTR) and Crack Sensitivity Ratio (CSR).

This annex specifies additional provisions that apply for PSL 2 pipe that is ordered for sour service [see 7.2 c) 51 ] .

NOTE The consequences of sudden failures of metallic components used for the oil and gas production associated with their exposure to H2S- containing production fluids led to the development of NACE MR0175/ISO 15156-1[21] and subsequently EFC publication 16[13] ISO 15156-2 used those sources to provide requirements and recommendations for materials qualification and selection for application in environments containing wet H2S in oil and gas production systems. Carbon and low alloy steels selected using ISO 15156&mdash;2 are resistant to cracking in defined H2S containing environments in oil and gas production but are not necessarily immune to cracking under all service conditions. Different service conditions might necessitate the alternative testing that is dealt with in ISO 15156&mdash;2:2003, Annex B. That annex specifies requirements for qualifying carbon and low alloy steels for H2S service by laboratory testing.

It is the purchaser&rsquo;s responsibility to select the carbon and low-alloy steels suitable for the intended service.

H.2 Additional information to be supplied by the purchaser

in addition to items a ) to g) as specified by 7.1, the purchase order shall indicate which of the following provisions apply for the specific order item:

a ) steel casting method for strip or plate used for the manufacture of welded pipe (see H.3.3.2.1);

a ) Based upon product analysis (see 9.2.4 and 9.2.5) The CEllw limits apply if the carbon mass fraction is greater than 0,12 % and the CEpcm limits apply if the carbon mass fraction is less than or equal to 0,12 %.

b )
For each reduction of 0,01 % below the specified maximum for carbon, an increase of 0,05 % above the specified maximum for manganese is permissible, up to a maximum increase of 0,20 %.

e ) The maximum limit for sulfur concentration may be increased to &le; 0,008 % for SMLS pipe and, if agreed, to &le; 0,006 % for welded pipe. For such higher-sulfur levels in welded pipe, lower Ca/s ratios may be agreed.

a For intermediate grades, the difference between the specified maximum yield strength and the specified minimum yield strength shall be as given in the table for the next higher grade, and the difference between the specified minimum tensile strength and the specified minimum yield strength shall be as given in the table for the next higher grade, For intermediate grades, the tensile strength shall be &le; 760 MPa (110 200 psi).

b This limit applies for pipe with D &gt;323, 9 mm (12.750 in).

c For intermediate grades, the specified minimum tensile strength for the weld seam shall be the same value as was determined for the pipe body using footnote a).

---- for full-section test pieces, the lesser of a) 485 mm2 (0.75 in2) and b) the cross-sectional area of the test piece, derived using the specified outside diameter and the specified wall thickness of the pipe, rounded to the nearest 10 mm2 (0.01 in2)

---- for strip test pieces, the lesser of a) 485 mm2( 0.75 in2 ) and b) the cross-sectional area of the test piece, derived using the specified width of the test piece and the specified wall thickness of the pipe, rounded to the nearest_10 mm2 (0.01 in2 );

The test for evaluation of resistance-to hydrogen- induced cracking shall meet the following acceptance criteria, with each ratio being the maximum permissible average for three sections per test specimen when tested in solution (Environment) A (see ISO 15156-2:2003, Table B.3):

a) crack sensitivity ratio (CSR) &le; 2 %;

b) crack length ratio (CLR) &le; 15 %;

c) crack thickness ratio (CTR) &le; 5 %;

If HIC/SWC tests are conducted in alternative . media (see H.7.3.1.3) to simulate specific service conditions, alternative acceptance criteria may be agreed.

H.4.4 Hardness test

For test pieces subjected to a hardness test (see H.7.3), the hardness in the pipe body, the weld and HAZ shall be &le; 250 HV10 or 22 HRC (70,6 HR 15N).

The maximum acceptabie hareness of an unexposed weld cap and external surface HAZ and base metal may be 275 HV10 or 26 HRC (73,0 HR 15N) where the equipment user agrees to the alternative weld cap hardness limit, the parent pipe wall thickness is greater than 9 mm, the weld cap is not exposed directly to the sour environment and the escape of hydrogen is not impeded, e.g by cathodic protection.

API 5L Grade B SSC Tested Pipe Comparative Specifications

The information here is summarized from ASTM Standards and API Specification 5L. Please see the specific standards for more information.